public class Example4_9 {
	public static void main(String args[]) {
		SIM simOne = new SIM(13889776509L);
		MobileTelephone mobile = new MobileTelephone();
		mobile.setSIM(simOne);
		System.out.println("手机号码:"+mobile.lookNumber());
		SIM simTwo = new SIM(15967563567L);
		mobile.setSIM(simTwo);
		System.out.println("手机号码:"+mobile.lookNumber());
	}
}
